MccB

• Description: cystathionine lyase/ homocysteine gamma-lyase
  
  

Gene name	mccB
Synonyms	yrhB
Essential	no
Product	cystathionine lyase/ homocysteine gamma-lyase
Function	methionine-to-cysteine conversion
Metabolic function and regulation of this protein in SubtiPathways: Cys, Met & Sulfate assimilation
MW, pI	40 kDa, 5.215
Gene length, protein length	1137 bp, 379 aa
Immediate neighbours	yrhC, mccA
Get the DNA and protein sequences (Barbe et al., 2009)
Genetic context This image was kindly provided by SubtiList

The gene

Basic information

• Locus tag: BSU27250

Database entries

• DBTBS entry: [1]

• SubtiList entry: [2]

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity: L-cystathionine + H₂O = L-cysteine + NH₃ + 2-oxobutanoate (according to Swiss-Prot)

• Protein family: trans-sulfuration enzymes family (according to Swiss-Prot)

• Paralogous protein(s):

Extended information on the protein

• Kinetic information:

• Domains:

• Modification:

• Cofactor(s):

• Effectors of protein activity:

• Interactions:

• Localization: cell membrane (according to Swiss-Prot)

Database entries

• Structure:

• UniProt: O05394

• KEGG entry: [3]

• E.C. number: 4.4.1.1

Expression and regulation

• Operon: yrrT-mtnN-mccA-mccB-yrhC PubMed

• Sigma factor: SigA PubMed

• Regulation: repressed in the presence of cysteine (CymR) PubMed
  • repressed in the presence of cysteine (CymR) PubMed

• Regulatory mechanism: CymR: transcription repression PubMed
  • CymR: transcription repression PubMed

• Additional information:

Biological materials

• Mutant:

• Expression vector:

• lacZ fusion:

• GFP fusion:

• two-hybrid system:

• Antibody:

References

Marie-Françoise Hullo, Sandrine Auger, Olga Soutourina, Octavian Barzu, Mireille Yvon, Antoine Danchin, Isabelle Martin-Verstraete
Conversion of methionine to cysteine in Bacillus subtilis and its regulation.
J Bacteriol: 2007, 189(1);187-97
[PubMed:17056751] [WorldCat.org] [DOI] (P p)

Sergine Even, Pierre Burguière, Sandrine Auger, Olga Soutourina, Antoine Danchin, Isabelle Martin-Verstraete
Global control of cysteine metabolism by CymR in Bacillus subtilis.
J Bacteriol: 2006, 188(6);2184-97
[PubMed:16513748] [WorldCat.org] [DOI] (P p)